San Leandro, CA
Long-term air quality
What this page tells you
This page combines annual PM2.5, unhealthy days, 5-year trend, and data coverage so you can compare long-term air quality, not just today's reading.
San Leandro, CA air quality summary: San Leandro, CA maintains a clean air score of 79 and a grade of B, reflecting generally healthy air quality. The annual mean for PM2.5 concentrations in the city is 6.7 µg/m³. The annual mean PM2.5 concentration in San Leandro is 6.7 µg/m³. Long-term air quality in San Leandro has seen limited or modest change in recent years.
Clean Air Score
A clean air score of 79 and a grade of B indicate that San Leandro experiences relatively low levels of long-term particulate exposure. This suggests that the air quality is suitable for most residents over the long term.
🏡 What This Means for Buying
Air quality in San Leandro should be treated as one factor in a broader relocation or housing decision. The city's B grade represents a moderate and generally acceptable level of long-term pollution exposure.
Indoor Air Quality in San Leandro, CA
Outdoor pollution can still affect indoor air when windows are open, filtration is weak, or wildfire smoke moves in.
How to react when today's AQI changes
Use the AQI bands below to decide whether to open windows, run an air purifier, or stay indoors when pollution spikes in San Leandro.
AQI 0-50
GoodOpen windows: Open windows if you want fresh air.
Air purifier: No purifier needed for most homes.
Indoor activity: Normal indoor activity is fine.
AQI 51-100
ModerateOpen windows: Sensitive groups should limit open-window time.
Air purifier: Use fans or filtration if dust or pollen is bothering you.
Indoor activity: Most people can stay active indoors.
AQI 101-150
Unhealthy for Sensitive GroupsOpen windows: Keep windows closed.
Air purifier: Run a HEPA purifier in the main room and bedroom.
Indoor activity: Sensitive groups should reduce outdoor exposure.
AQI 151+
UnhealthyOpen windows: Keep windows and doors closed.
Air purifier: Run HEPA continuously and seal obvious drafts.
Indoor activity: Stay indoors as much as possible; use an N95 if you must go out.
Common indoor air concerns in San Leandro:
- Wildfire smoke infiltration (PM2.5)
- Seasonal pollen and dust mite allergens
- VOCs from household products
Recommended action: If today's AQI reaches 101 or higher, close windows and run HEPA filtration before indoor air starts to feel smoky or stale.
Top Products for San Leandro Homes:
🩺 My Health Risk Assessment
See how San Leandro's air quality affects you and your family specifically.
Health Advice
Enjoy the outdoors! Air quality is great.
Add San Leandro Air Quality to your site
Perfect for local news, real estate blogs, and community pages.
</> Create Free Widget🏡 Property Value Impact Analysis
Between 2019 and 2024, San Leandro's air quality improved by 0.5 μg/m³. Based on NBER studies, this change correlates with a estimated 2% increase in relative property value retention.
Cleaner Alternatives in CA
Why San Leandro earned a 79
Raw inputs, scoring weights, and data coverage for this city.
Best Time to Run
Find the cleanest hours for your run today.
Cycling Forecast
Avoid pollution spikes on your next ride.
📅 Past 30 Days Trend
Real-time daily PM2.5 AQI
🌸 Pollen Outlook
Current Seasonal Forecast
How it worksBased on current seasonal forecast data. Not a long-term pollution rating or relocation score.
Score Breakdown
| Component | Weight | Score Contribution |
|---|---|---|
| Annual Air Quality | 40% | 75.2 |
| Unhealthy Days | 25% | 100 |
| 5-Year Trend | 20% | 50 |
| Seasonal Variability | 10% | 89.8 |
| Extreme Events | 5% | 100 |
Explore More Air Quality Data
Frequently Asked Questions
About This Data
Data Sources
Historical air quality mapping and scoring are based completely on official U.S. Environmental Protection Agency (EPA) AirNow API data. 5-day AQI forecasts are provided by WAQI.
Methodology
Our Clean Air Score (0-100) is a proprietary algorithm that weighs multiple factors:
- Annual PM2.5 averages (40%)
- Frequency of unhealthy days (25%)
- 5-year pollution trends (20%)
- Seasonal variability and extreme events (15%)
Updates & Accuracy
Real-time data is updated hourly. Historical aggregate scores are recalculated monthly to reflect the latest trends. While we strive for accuracy, sensor maintenance and local conditions can affect individual readings.
Practical Advice
When AQI > 100: Sensitive groups (children, elderly, asthmatics) should limit prolonged outdoor exertion.
When AQI > 150: Everyone should avoid outdoor exercise and keep windows closed.
More Cities in CA
Similar Rankings Nationwide
San Leandro Air Quality FAQs
Is San Leandro a good fit for people who care about long-term air quality?
San Leandro is a reasonable choice, as it carries a clean air score of 79 and a grade of B. With a PM2.5 annual mean of 6.7 µg/m³, the city offers moderate long-term air quality.
How frequent is unhealthy air in San Leandro?
San Leandro reports 0% of days as unhealthy, maintaining a grade of B and a PM2.5 annual mean of 6.7 µg/m³. This indicates consistent exposure to acceptable air quality levels.
Is air quality in San Leandro improving or getting worse over time?
The long-term air quality trend in San Leandro is described as stable, with limited or modest change in recent years.
Does air quality vary within San Leandro?
Air quality within San Leandro can vary based on local traffic, industry, and location patterns.